soudflower seems to mess up osx 10.6.6

Well, I have just installed soudflowerbed.. And since that no way to have a correct sound in my usb headset (logitech) which was previously working fine…

I have of course tried to unplug/replug the headset rebooted, uninstalled soudflower, re-rebooted, reinstalled… Still the behavior keeps being the following :
* The sound is OK with the speakers and with the outside mini-jack
* When I listen the usb headset, the sound is very very very much lower and unbalanced on one ear
* If I open the MIDI ocntroler and I set the headset as a 1 channel output (instead of 2), the sound is back OK on the 2 ears…. But again bad if I come back to 2 channels

It is clearly connected to soudflower : the problem starts after I installed it….
I have a mac book pro old generation 2008… everything up to date…